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| Main Authors: | , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2511.15972 |
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| _version_ | 1866917094045515776 |
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| author | Xu, Guofu Pan, Feihao Ou, Jiyang Ma, Wenjun Zhang, Xu Li, Xiling Yu, Guoqiang Cheng, Peng Xu, Hongjun Chai, Guozhi |
| author_facet | Xu, Guofu Pan, Feihao Ou, Jiyang Ma, Wenjun Zhang, Xu Li, Xiling Yu, Guoqiang Cheng, Peng Xu, Hongjun Chai, Guozhi |
| contents | Here, we investigate the spin waves in room-temperature van der Waals ferromagnet $(\rm Fe_{0.78}Co_{0.22})_{5}GeTe_{2}$ by utilizing Brillouin light scattering technique. The spin wave dispersion in flakes of different thicknesses shows the key role of dipolar interaction in the spin waves of vdW ferromagnets, and the non-reciprocity of spin wave in thick flakes is observed, which is attributed to the bulk Dzyaloshinskii-Moriya interaction after excluding the influence of dynamic dipolar interaction. The measured bulk DMI parameter D is 0.08 $\rm mJ/m^2$, which is double that of pure $\rm Fe_5GeTe_2$. Our work shows that Co-doped $\rm Fe_5GeTe_2$ is a promising platform for investigating propagating spin wave and topological spin textures at room temperature. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_15972 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Nonreciprocal spin wave in room-temperature van der Waals ferromagnet $(\rm Fe_{0.78}Co_{0.22})_{5}GeTe_{2}$ Xu, Guofu Pan, Feihao Ou, Jiyang Ma, Wenjun Zhang, Xu Li, Xiling Yu, Guoqiang Cheng, Peng Xu, Hongjun Chai, Guozhi Mesoscale and Nanoscale Physics Here, we investigate the spin waves in room-temperature van der Waals ferromagnet $(\rm Fe_{0.78}Co_{0.22})_{5}GeTe_{2}$ by utilizing Brillouin light scattering technique. The spin wave dispersion in flakes of different thicknesses shows the key role of dipolar interaction in the spin waves of vdW ferromagnets, and the non-reciprocity of spin wave in thick flakes is observed, which is attributed to the bulk Dzyaloshinskii-Moriya interaction after excluding the influence of dynamic dipolar interaction. The measured bulk DMI parameter D is 0.08 $\rm mJ/m^2$, which is double that of pure $\rm Fe_5GeTe_2$. Our work shows that Co-doped $\rm Fe_5GeTe_2$ is a promising platform for investigating propagating spin wave and topological spin textures at room temperature. |
| title | Nonreciprocal spin wave in room-temperature van der Waals ferromagnet $(\rm Fe_{0.78}Co_{0.22})_{5}GeTe_{2}$ |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2511.15972 |